Moonfallen Bow

Weapon (any bow), legendary (requires attunement)

This bow doesn't need to be strung. A twinkling glimmer of starlight appears between the bow's ends when you reach for it: grasping the light and pulling it back, as if it were a bowstring, causes a string of light to materialize and draw the bow. An illusory image of the moon's face appears in the space between the bow and its drawn string.

When you draw the bow in this way, an arrow of pure light springs into existence and is nocked into the bow. You gain a +2 bonus to attack and damage rolls made with this magic weapon when firing an arrow of light, which deals radiant damage instead of piercing damage. The drawn bow and its arrows of light each shed bright light in a 10-foot radius and dim light for an additional 10 feet. Hit or miss, an arrow of light disappears immediately after the attack.

A target that's hit by an arrow of light is marked by a point of starlight, which moves with the target and sheds dim light in a 10-foot radius. Each mark remains until the end of your next turn. Whenever you move in a straight line toward a marked target, opportunity attacks against you are made with disadvantage.

Guiding Arrow. While holding the bow, you can use an action to cast the guiding bolt spell from it, drawing the bow back as normal before firing the spell's bolt of light from it. Use your weapon attack bonus with the bow for the spell attack, including its +2 bonus to attack rolls. You still add your Dexterity modifier, plus the bow's +2 bonus, to the damage from this version of the spell. If the target is marked by a point of starlight, you also have advantage on the attack roll.

Moonfall. As an action, you can fire an arrow of light into the air above you. When you do, pick a point that you can see within 60 feet of you. The arrow immediately winks out, and a cascade of withering, bright light descends from the sky 60 feet above the point. The light fills the area of a 20-foot-radius cylinder that's 60 feet high, centered on the point. Each hostile creature within the light when it appears must make a DC 17 Constitution saving throw; shapechangers and creatures marked by a point of starlight make the saving throw with disadvantage. A creature takes 4d10 radiant damage on a failed save, or half as much damage on a successful one. The light remains until the end of your next turn. For the duration, hostile creatures treat the area as if it were difficult terrain, and you treat the entire area as if it were marked by points of starlight. In addition, illusions are temporarily suppressed while in the area of light, and any shapechanger within the light automatically reverts to its original form and can’t assume a different form until it leaves the area. This property can be used three times, and it regains all expended uses of it daily at dawn.

Long ago, in a land so ruled by shade that the Sun refused to shine on it, was a curious girl. She had heard legends of the Sun, but she wished to know it better. And so, she set out from her home into the shadows, to find those old enough to have seen it.

First, on the open road, she met a beast of shadows; a thing of many eyes once cowed by the sun. It told her of the great disk, so bright that looking at it caused one to see in it patches of dark. From this, she saw the Sun as a circle of light, patterned by shade.

Second, along a high mountain pass, she met a dragon; a hunter of the once-blue sky. They spoke of brilliance that shone across the land, beneath which all could be seen. And so, she imagined its guiding rays, leading all to their purpose.

Last, in a city of ruin, she met an elf; priest of a fallen temple to the Sun. He preached of it as the source of Truth, and when its intent passed across the land deceptions were stripped away. This gave her a vision of a great, cycling force, that reflected the true nature of things.

From these tales, the girl—now a sorceress of renown—sought to create a new Sun to clear the land of shade. And so she shaped it: bright but not uniform, revealing but not burning, vigilant but ever-changing.

She forged the Moon.